Actions

Difference between revisions of "Low Latency audio"

From Zenitel Wiki

(Created page with "In certain situations high latency on audio Latency refers to the delay between when an audio signal enters a system and when it emerges. Excessive audio latency has the pot...")
 
Line 3: Line 3:
 
Latency refers to the delay between when an audio signal enters a system and when it emerges. Excessive audio latency has the potential to degrade call quality.
 
Latency refers to the delay between when an audio signal enters a system and when it emerges. Excessive audio latency has the potential to degrade call quality.
  
PA-Announcement
+
Typical scenarios where latency might become an issue is:
 
+
* PA-Announcement where the operator hear his own announcement from nearby VoIP devices (e.g. IP Speakers or Intercoms)
Target goal: < 70 ms
+
* Systems with a mix of analogue and digital audio paths. Audio from the operator is distributed partly to main PA speakers through the analogue path, and partly to speakers via a digital (VoIP) path. The analogue path will have close to zero delay, while the digital path will have some delay.
 
 
For a typical use-case doing PA-Announcement operator do not like to hear himself with a long delay.
 
Also we can have mixed analogue/digital systems where for example the main speakers are on dialogue path while audio is also placed on digital endpoints.
 
The analogue path will be  close to zero delay so audio in digital endpoint can not be large in zones where both audio sources is audible.
 

Revision as of 12:08, 26 May 2023

In certain situations high latency on audio

Latency refers to the delay between when an audio signal enters a system and when it emerges. Excessive audio latency has the potential to degrade call quality.

Typical scenarios where latency might become an issue is:

  • PA-Announcement where the operator hear his own announcement from nearby VoIP devices (e.g. IP Speakers or Intercoms)
  • Systems with a mix of analogue and digital audio paths. Audio from the operator is distributed partly to main PA speakers through the analogue path, and partly to speakers via a digital (VoIP) path. The analogue path will have close to zero delay, while the digital path will have some delay.